JPS5921570B2 - Handling depth adjustment device for combine harvesters - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a handling depth adjustment device for a combine harvester.

Traditionally, in combine harvesters that thresh harvested shell culms, in order to improve performance, the shell culm conveying device has been automatically operated in order to always supply the shell culms to the threshing device at a constant handling depth regardless of the length of the harvested shell culms. Devices that change the posture have been considered, but in these devices, when the machine rotates after one stroke of reaping work and moves on to the next stroke of reaping work, the posture of the transport device remains the same and the machine continues to the next stroke. If there is a difference in the length of the husk culm to be cut before and after the reaping process, or if the cutting rate is slightly high or low at the start of the next reaping process, the culm should be compared to the culm at the beginning of the next reaping process. This sometimes causes a delay in adjusting the attitude of the conveying device, resulting in unhandled grains and other problems that reduce threshing performance.

On the other hand, Japanese Patent Application Laid-open No. 115817/1984 describes changing the posture of the transport device so that it is in a completely retracted state after the end of the reaping work. This is convenient for storage, but as mentioned above, the conveying device becomes fully retracted every time there is a transition from one stroke to the next during the reaping process, resulting in excessively deep handling at the start of the next stroke. Threshing department
There was a problem in that the sorting section was overloaded.

However, the present invention is aimed at solving the above-mentioned difficulties, and includes a conveyor for holding and transporting the culm in the culm conveyance path from the reaping device to the threshing device, and by changing the relative position of the conveyor, the culm can be lengthened or shortened. In a combine harvester configured to be able to adjust the handling depth according to the culm, a tip sensor is provided near the tip of the shell culm conveyance path, and a tip sensor is provided near the stock of the shell culm conveyance path and closer to the tip sensor. It is characterized by a shell culm sensing body disposed on the downstream side of the transfer.

The present invention will be explained in detail below using examples.

A is a machine body having a traveling device at the bottom, a reaping and conveying device b in the front, and a threshing device C, a prime mover d, etc. in the rear.

The reaping conveyance device consists of a cutting blade 1, a raising body 2, and a base conveying body 3.
- Consists of a tip carrier 4, a lifting carrier 5, etc.

The lifting conveyor 5 has its starting end located at the end of the base conveying body 3, and its terminal end located at the starting end of the foot chain 6 of the threshing device C, so that the base of the culm is located between the cheno 5a and the pinning rod 5b. It is installed diagonally so that the tip side can be transferred in a leading state by being held between the feet, and the terminal end can be moved in the distance (horizontal) direction between the tip end and the starting end of the foot chain 6, and the starting end can be moved in the vertical direction using multiple points as fulcrums. It consists of

Reference numeral e denotes a hydraulic drive device for tilting the lifting carrier 5, which is composed of a hydraulic pump 7, a cylinder 8, electromagnetic valves 5QL1°5OL2, and the like.

M and H are ear tip sensing bodies installed in the culm transport route, respectively;
L is the shell culm sensor installed in the shell culm conveyance path, and H is the shell culm sensor.
are microswitches that are normally open and M is a normally closed microswitch. The tips of the culms are placed at an appropriate distance of 5M so that they come into contact with each other.
L is provided so that the base of the shell culm comes into contact with the lifting carrier 5.

In this case, the attachment position of L is shifted toward the lower side of the transfer so that the culm to be transferred comes into contact with M or H after it comes into contact with it.

X is an automatic/manual changeover switch for the hydraulic drive device e; on is automatic and off is manual; Y and Z are switches for manual deep handling and shallow handling, respectively, which are normally open.

Next, the effect will be explained.

When each part is driven by the prime mover d and the machine is advanced to a field where the shell culm is being erected, the shell culm is cut by the cutting blade 1 at the base while being pulled up by the pulling body 2, and is transferred to the threshing device C by the conveying device 3°4.5. The grains will be transported to Japan and undergo threshing processing.

Now, let's explain the adjustment of the length and shortness of each culm in the automatic state with the changeover switch , the stock part comes into contact with L, so M
is closed, L is open, and the solenoid valves S OLl , S Q L
2 is not energized and the carrier 5 is immobile.

(b) In the case of a short culm, the shell culm during transport does not come into contact with the sensing bodies H and M, but only with the L.

M closes and H opens, respectively, and the electromagnetic valve 5oL1 operates to tilt the carrier 5 in the direction of the arrow to take a deep handling posture.

(・→ In the case of a long culm, the shell culm during transport is a sensing body HtM.

Since it comes into contact with each of L, H and L are closed and M is opened, so that the electromagnetic valve 5OL2 is activated and the carrier 5 is tilted in the opposite direction of the arrow to take a shallow handling attitude.

In addition, when the conveyor 5 passes the final culm, the tip side does not contact H or M first (after that, the stock base comes into contact with L later), so the final culm does not contact H or M first. The above-mentioned (
In the same state as b), the attitude of the carrier 5 is changed to the deep handling side, but the carrier 5 stops after the last shell culm passes the shell culm sensing body.

Therefore, even if there is a difference in the length of the culm to be cut in the previous and subsequent work processes, or even if the cutting rate is slightly high or low at the start of the next process, the conveyor 5 will be moved slightly deeper at the start of the next process. Since it is located on the handling side, it is possible to prevent unhandled parts and also to prevent significant overload (deep handling) as occurs in JP-A-49-115817 and the like.

In this way, the present invention provides a conveying body that clamps and transfers the husk culm in the husk conveyance path from the reaping device to the threshing device, and adjusts the handling depth according to the length of the culm by changing the relative position of the conveying body. In the combine harvester configured to obtain a husk, a husk tip sensing body is provided near the tip of the husk culm conveyance path, and a husk culm sensing body is provided on the husk culm conveyance path closer to the stock and downstream of the husk tip sensing body. Because of this, the culm length is properly detected and the handling depth is adjusted properly for the harvested husk culm until it is transported to the final stage. Even if there is a difference in the length of the husk to be harvested between the previous and subsequent reaping strokes, or if the harvesting rate is slightly high or low at the start of the next reaping process, the conveyor will always maintain a slightly higher or lower harvest after one reaping process. Since it is in a state where it is waiting in the deep handling side posture, even if the next process is a short culm, there is no risk of it being left untreated or the culm falling off at the joint, and when the next process starts. There is no risk of serious mistreatment.

Therefore, the operator is freed from the complicated adjustment operations of the carrier and can concentrate on operating the aircraft, which has the remarkable effect of increasing work efficiency.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, and Figure 1 is an overall plan view;
FIG. 2 is a side view of the same, FIG. 3 is an explanatory diagram of the main parts, and FIG. 4 is an electric circuit diagram. C... Threshing device, 5... Conveyor, H,
M: Tip sensing body, L: Culm sensing body, e: Hydraulic drive device.

Claims (1)

[Claims] 1. In a combine harvester configured such that a conveyor for pinching and transferring the husk culm is provided in the husk culm conveyance path from the reaping device to the threshing device, and handling depth can be adjusted according to the length of the culm by changing the relative position of the conveyor. , a husk tip sensing body is provided near the tip of the husk culm transport route, and a husk culm sensing body is disposed closer to the plant base of the husk culm transport route and on the lower side of the transport side than the husk tip sensor. Handling depth adjustment device for combine harvesters.